Abstract
SUMMARY The effects of damaging the testa and the application of seed dressings were examined in field trials on several short‐and long‐season cultivars of groundnut ( Arachis hypogea ) with differently‐pigmented testas at Samaru, Nigeria, in 1967. There was a high correlation between the number of seedlings which emerged in these trials and the resistance or susceptibility of the seed to invasion by the fungus Aspergillus flavus , as assessed by laboratory tests. When the testa was undamaged the emergence of white (susceptible) seed was only 50% while that of coloured (resistant) seed was between 95 and 98%. Damage to the testa by scratching greatly decreased emergence. The application of seed dressing increased the emergence of susceptible seed and also restored the emergence of scratched seeds to the level of undamaged seeds. The effect of the complete removal of the testa was not counteracted by seed dressing; naked seeds, with and without dressing, gave c. 10% emergence. The importance of pigment in the testa, the condition of the seed and the effects of seed dressing are discussed.
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Claims 7
Claim · model-written summary
Seedling emergence correlated highly with susceptibility to Aspergillus flavus invasion.
- Taxon
- groundnut
Arachis hypogaeat0 - Interactor
- Aspergillus flavus
Aspergillus flavuse0pathogen - Outcome
- number of seedlings which emergede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a high correlation between the number of seedlings which emerged in these trials and the resistance or susceptibility of the seed to invasion by the fungus Aspergillus flavus”
t0“groundnut”
Claim · model-written summary
Undamaged white seed had 50% emergence.
- Taxon
- groundnutArachis hypogaeat0
- Material
- white (susceptible) seede0
- Outcome
- emergencee0
- Value
- 50%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the testa was undamaged the emergence of white (susceptible) seed was only 50%”
t0“groundnut”
Claim · model-written summary
Undamaged coloured seed had 95 to 98% emergence.
- Taxon
- groundnutArachis hypogaeat0
- Material
- coloured (resistant) seede0
- Outcome
- coloured (resistant) seede0
- Value
- 95 and 98%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“coloured (resistant) seed was between 95 and 98%.”
t0“groundnut”
Claim · model-written summary
Scratching the testa greatly decreased emergence.
- Taxon
- groundnutArachis hypogaeat0
- Treatment
- Damage to the testa by scratchinge0
- Outcome
- emergencee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Damage to the testa by scratching greatly decreased emergence.”
t0“groundnut”
Claim · model-written summary
Seed dressing increased emergence of susceptible seed.
- Taxon
- groundnutArachis hypogaeat0
- Treatment
- seed dressinge0
- Outcome
- emergence of susceptible seede0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of seed dressing increased the emergence of susceptible seed”
t0“groundnut”
Claim · model-written summary
Seed dressing restored scratched seed emergence to the undamaged level.
- Taxon
- groundnutArachis hypogaeat0
- Treatment
- seed dressinge1
- Outcome
- emergence of scratched seedse0
- Direction
- restorede0
- Comparator
- undamaged seedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“restored the emergence of scratched seeds to the level of undamaged seeds.”
t0“groundnut”
e1“The application of seed dressing”
Claim · model-written summary
Seed dressing did not counteract complete testa removal; naked seeds had about 10% emergence.
- Taxon
- groundnutArachis hypogaeat0
- Treatment
- dressinge0
- Outcome
- emergencee0
- Value
- c. 10%e0
- Comparator
- without dressinge0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“naked seeds, with and without dressing, gave c. 10% emergence.”
t0“groundnut”
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See all 48 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.